Abstract : In this study, we were interested in the behaviors of individuals who preserve the social and organizational environment by ensuring sustainability. More specifically, we are interested in allegiant behaviors. Numerous studies have highlighted the normative character of allegiance. Therefore, we questioned the value attributed to allegiance. We questioned 170 employees on social values that they attribute in terms of desirability and utility to a future colleague (subordinate or peer) starting from the responses that these future colleagues were supposed to have submitted to an allegiance questionnaire. It was observed that desirability and utility make reference to two independent dimensions, utility being often more important. It was also noted there is greater severity assigned to endo-group targets (future peers) than to exo-group targets (future subordinates). Finally, it was noted that there was not so much a valuation of allegiant targets, but rather a rejection of rebel targets, which raises the question of the bi-dimensionality of the valuation-devaluation process.